Ivoclar Vivadent IPS d.SIGN - Manual (Page 28)

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d.SIGN – Instructions for Use
IP
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A model with detachable segments is used as the basis.
Dies isolated with a sealer, followed by a spacer layer.
Fabricating the framework
When fabricating the framework, make sure that the
minimum wall thickness after finishing is 0.3 mm for single
crowns and 0.5 mm for bridge abutments. These dimensions
are the prerequisite for the stability of the metal framework
and the durable bond between the metal and ceramic
material. If the stipulated framework and connector
dimensions are not observed, stress within the material may
cause delamination of the ceramic material and distortion of
the framework.
Recommended procedure
1. Complete modelling of the anatomical tooth shape
2. Reduce to make room for the veneering materials
3. Waxing of the contact points and connector areas
4. Checking the occlusal and proximal contact points
Starting situation
Fabricate a master model or a model with detachable
segments on the basis of the impression in the usual manner.
It is advisable to apply a sealer to harden the surface to
protect the die from abrasion. The application of a sealer
must not cause any changes in the dimension of the die.
After that, a spacer may be applied in the usual manner.